1321202122012 has 12 divisors (see below), whose sum is σ = 2313185667520. Its totient is φ = 660291931296.

The previous prime is 1321202122003. The next prime is 1321202122013. The reversal of 1321202122012 is 2102212021231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321202122013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77272812 + ... + 77289907.

Almost surely, 2^{1321202122012} is an apocalyptic number.

It is an amenable number.

1321202122012 is a deficient number, since it is larger than the sum of its proper divisors (991983545508).

1321202122012 is a wasteful number, since it uses less digits than its factorization.

1321202122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154564860 (or 154564858 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1321202122012 its reverse (2102212021231), we get a palindrome (3423414143243).

The spelling of 1321202122012 in words is "one trillion, three hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, twelve".